Fortunately, it isn’t serious as the England international returned to training at Carrington on Wednesday, but it’s bad enough to keep him out against Watford, according to The Sun.

It’s suggested that Shaw won’t be risked as he faces concussion tests, and so it’s expected that he may well make his return against Young Boys in the Champions League next week.

Naturally, it will come as a disappointing setback for the player and Jose Mourinho, considering he has established himself as a regular starter at the beginning of the season and had forced his way back into England recognition.

He’ll hope that he can quickly recover from the knock and pick up from where he left off in order to avoid the setback from disrupting the momentum that he was building.

Mourinho will likely give Ashley Young the nod to fill in at left-back this weekend, as the stalwart did so often last season to great effect, and so Shaw will also be wary of his teammate impressing on Saturday evening and potentially keeping him out of the starting XI.

Nevertheless, whether it’s more precautionary or otherwise, it’s suggested that Shaw will not feature against Watford and so his main priority this week will have to be to continue his recovery, pass the relevant tests and get back to action as soon as possible.